Classic Shell Scripting

Processes

The following commands create, remove, or manage processes:

at	Executes jobs at a specified time. at schedules jobs to be executed just once, whereas cron schedules them to be executed regularly.
batch	Executes jobs when the system is not too overloaded.
cron	Executes jobs at specified times.
crontab	Edit per-user "cron table" files that specify what commands to run, and when.
fuser	Find processes using particular files or sockets.
kill	Send a signal to one or more processes.
nice	Change the priority of a process before starting it.
ps	Process status. Print information about running processes.
renice	Change the priority of a process that has already been started.
sleep	Stop execution for the given number of seconds.
top	Interactively display the most CPU-intensive jobs on the system.
wait	Shell built-in command to wait for one or more processes to complete.
xargs	Read strings on standard input, passing as many as possible as arguments to a given command. Most often used together with find.